Duomo CO200 Manual

Application

Duomo is recognised within the gas industry for
providing a comprehensive range of low cost, high
reliability gas detection for many applications. We
have installed and commissioned natural gas and
carbon monoxide sensors in applications such as
boiler rooms, kitchens, car parks, aircraft hangers,
factories and shopping centres. The CO200 Duct is
an intelligent electronic device which constantly
m o n i t o r s c a r b o n m o n o x i d e l e v e l s . T h e
electrochemical sensor technology provides specific
d e t e c t i o n o f c a r b o n m o n o x i d e . R u g g e d
construction and IP55 protective rating make this
unit ideal for damp conditions such as car parks. The
CO200 Duct can be used as a stand alone intrument
or can be connected to the BX444M, GS300M,
GS100M and BX150 controllers. A 20mA signal will
be derived from the device when alarm thresholds
are reached. These are 300ppm instantaneous
alarm, 100ppm alarm in 10 minutes, 30ppm alarm in
12 hours. This device, in conjunction with the above
mentioned controllers can be used to control gas
valves, sirens or air extract systems.
i
12 - 24V DC supply
IP55 protective rating
Electrochemical sensor technology
4 - 20mA linear output and TWA
CE certified No. 96125
EN50291 for toxic gas
3 year guarantee
DO NOT TEST THIS SENSOR WITH ANYTHING OTHER THAN DUOMO
TEST GAS, 350ppm CARBON MONOXIDE IN AIR. Concentrations
above this will damage the sensor and shorten sensor life.
CO200 Duct Sensor

Operation

The CO200 Duct is a carbon monoxide sensor which
provides a linear 4 - 20mA output. The sensor
a u t o m a t i c a l l y c a l c u l a t e s c a r b o n m o n o x i d e
concentration relative to time (Time Weighted
Average) and will give a 20mA output from terminal
3 should the carbon monoxide levels remain above
predetermined levels for extended periods. This is
useful when carbon monoxide levels are likely to
drop rapidly when extract fans are boosted. Thus
the TWA threshold may not be reached but an
indication of actual carbon monoxide levels is
required for BMS and ventilation interfacing.
CAUTION! Carefully read the following instructions
prior to installation of this device. Always keep this
pamphlet for future reference. Ensure that the gas
detection system is wired correctly and is only used
for the purpose for which it is intended.